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    <title>secto3d</title>
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    <center>Scilab Function</center>
    <div align="right">Last update : April 1993</div>
    <p>
      <b>secto3d</b> -  3D surfaces conversion</p>
    <h3>
      <font color="blue">Calling Sequence</font>
    </h3>
    <dl>
      <dd>
        <tt>[m[,x]]=secto3d(seclist,npas)  </tt>
      </dd>
      <dd>
        <tt>[m]=secto3d(seclist ,x)   </tt>
      </dd>
    </dl>
    <h3>
      <font color="blue">Parameters</font>
    </h3>
    <ul>
      <li>
        <tt>
          <b>seclist</b>
        </tt>: a list whose elements are (2,.) matrices</li>
      <li>
        <tt>
          <b>npas</b>
        </tt>: an integer</li>
      <li>
        <tt>
          <b>m</b>
        </tt>: a matrix</li>
      <li>
        <tt>
          <b>x</b>
        </tt>: a vector</li>
    </ul>
    <h3>
      <font color="blue">Description</font>
    </h3>
    <p>
    Considering a surface given through a list <tt>
        <b>seclist</b>
      </tt> of sections in the 
    <tt>
        <b>(x,z)</b>
      </tt> plane  <tt>
        <b>[m [,x]]=secto3d(seclist [,npas])</b>
      </tt> returns a matrix <tt>
        <b>m</b>
      </tt>
    which contains a regular discretization of the surface.
  </p>
    <dl>
      <dd>
        <b>-</b>The i-th row of the matrix m corresponds to the i-th section</dd>
      <dd>
        <b>-</b>The j-th column of m corresponds to the x(j)</dd>
    </dl>
    <p>
    Each section <tt>
        <b>seclist(i)</b>
      </tt> is described by a (2,.) matrix which gives respectively the x 
    and z coordinates of points.</p>
    <p>
      <tt>
        <b>[m]=secto3d(seclist ,x)</b>
      </tt> : in that case the x-vector gives the discretization 
    of the x-axis for all the sections</p>
    <h3>
      <font color="blue">See Also</font>
    </h3>
    <p>
      <a href="plot3d.htm">
        <tt>
          <b>plot3d</b>
        </tt>
      </a>,&nbsp;&nbsp;</p>
    <h3>
      <font color="blue">Author</font>
    </h3>
    <p>Steer S.; ;   </p>
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